Online) An Open Access

Abhijit Shil, Sobhan Kr, Mukherjee
2016 Online International Journal Available at   unpublished
The paper deals with cypselar anatomical characters of 9 species belonging to 4 genera (Achillea, Chamaemelum, Leucanthemopsis and Matricaria) of the tribe Anthemideae. The anatomical features of the above said species have been investigated to establish their potential usefulness in taxonomy. The significant anatomical features of cypselas are cypselar shape in T.S., cypselar cuticle, ribs or elevations no., size of the ribs, thickness of cypselar wall (in µm) at ribs and furrow, pericarp
more » ... rrow, pericarp thickness (in µm) at ribs and furrow, tissue differentiation of epicarp, epicarpic cell shape, epicarpic cell wall thickness, orientation of epicarpic cell, tissue differentiation of mesocarp, mesocarpic parenchymatous cell, mesocarpic sclerotic braces, mesocarpic vascular bundle, mesocarpic resin cavity, mesocarpic cavity, presence of endocarp, testa thickness (in µm), testal attachment with pericarp, tissue differentiation of testa and layers, cell content of testa, testal cell shape, thick walled cells of testa, crystals and their distribution, testal palisade cells, orientation of testal cells, endosperm in mature cypsela, non-cellular pellicle, nature of mature embryo, resin ducts/ secretory ducts in each cotyledon and relative size of the secretory ducts etc., have been examined. These characters of cypselas serve as reliable taxonomic marker in systematic study. The 'nature of testa' also has been used as significant taxonomic parameter for the identification of studied taxa. Based on these above features, an artificial key is prepared for easy identification.
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